<?php
//include_once 'common.php';
$db=new PDO('mysql:host=localhost;dbname=db', 'root','12qwas');
$result=$db->query("select cy as 成语,first 首字 from chengyu limit 2");
foreach ($result as $row){
//    print_r($row);
    echo "{$row[0]}----{$row['首字']}\n";
}